Stable and efficient sky-blue organic light emitting diodes employing a tetradentate platinum complex

Li, Guijie; Klimes, Kody; Fleetham, Tyler; Zhu, Zhi-Qiang; Li, Jian

doi:10.1063/1.4978674

Stable and efficient sky-blue organic light emitting diodes employing a tetradentate platinum complex

Journal Article · Thu Mar 16 00:00:00 EDT 2017 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4978674· OSTI ID:1473867

Li, Guijie ^[1]; Klimes, Kody ^[2]; Fleetham, Tyler ^[2]; Zhu, Zhi-Qiang ^[2]; Li, Jian ^[2]

Arizona State Univ., Tempe, AZ (United States); Zhejiang Univ. of Technology, Hangzhou (China); Arizona State University
Arizona State Univ., Tempe, AZ (United States)

A tetradentate Pt(II) complex platinum (II) [10-(9-(4-tert-butylpyridin-2-yl-κN)-9H-carbazol-2-yl-κC¹)-9,10-dihydro-9,9-dimethyl-3-(1H-pyrazol-1-yl-κN²)acridine-1-yl-κC¹] (PtN'1N-tBu) incorporating pyrazolyl-acridine as the lumophore was demonstrated to act as a stable and efficient sky-blue emitter. Phosphorescent organic light-emitting diode (OLED) employing PtN'1N-tBu without the electron blocking layer (EBL) achieved a high external quantum efficiency (EQE) of 15.9% and an estimated operational lifetime LT70 of 635 h at an initial luminance of 1000 cd/cm2. The device efficiency could be further improved by adding TrisPCz as EBL, reaching EQE of 17.3% and operational lifetime up to 482 h at 1000 cd/cm2.

View Accepted Manuscript (DOE)

Research Organization:: Arizona State Univ., Tempe, AZ (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: EE0007090

OSTI ID:: 1473867

Alternate ID(s):: OSTI ID: 1619779

Journal Information:: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 11 Vol. 110; ISSN 0003-6951

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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